Piston-sleeve valve for l-head motors



E. Rv. BURTNETT. PLSION SLEEVE VALVE FOR L HEAD MoToRs.

APPLICATION, .FILED UG- 5, 1920- Patented 0015.3, 1922i,

3 SHEETS-SHEET I E. R. BURTNETT. PISTON SLEEVE VALVE FOB L HEAD MOTORS. AFPLICTION FI-LED AUGS, |920. 1,430,622. Patented 0ct.3,1922.

3 SHEETS-SHEET 2.

,HUI fh y {lf/ "fr E. .BURTNETT. PISTGN SLEEVE VALVE FORL HEAD MOTORS.

PPLICATlON FILED'AUG., 192.0.

Pmd 061:. 3, 1922.

3 SHEETS-SHEET 3.

Patented @et E, l922.

j S'ATES EVERETT R. BURTNETT, OF LOS ANGELES,

CALIFORNIA, ASSIGNOR OF ONE-HALF TO HOB/IER A. :BRUNE-LL, 0F LGS ANGELES, CALIFORNA.

lPISTON-SLEEVE VALVE FOR- L-HEAD MOTORS.

Application filed August 5, 1920. Serial No. 401,533.

To all whom t may concern.'

Be it known that I, Eviinn'rtr R, BURTNETT, a citizen ci? the United States, residing at Los Angeles, in the county ol` Los Angeles and State of California, have invented new and useful improvements in Piston-Sleeve Valves for L-l-lead Motors, of which the 'following is a specification.

The object ot the present .invention is to provide a valve mechanism comprising a piston and sleeve combination which is applicable to L head internal combustion engines.

More particularly it is the object oi." the invention to provide a construction of this character so arranged as to form a structure which will not be of a weight greater than the conventional type of internal combustion engines. The improved construction is also one which compared to a conventional internal combustion engine is not of increased size in height, width or length.

The construction is also one which may he manufactured at a minimum cost and one which provides a valve mechanism in which the necessity for adjustingand grinding of the valves is eliminated. The valve mechanism will also he silent in operation and will function more effectively and smoother with continued use. The construction is one which permits oil' ellicient functioning thereof even when the engine becomes heated. ln addition to the greatly simplified construction provided by the invent-ion the facility and ease with which the various parts may be. removed and examined .is also greatly increased.

The'invention will he readily understood. lii'oin the following description oit the accompanying drawings, in which Figure l is an end view ot an internal combustion engine constructed in accordance with the invention.

Fig. 2 is a side elevation of the saine.

2. is a longitudinal section through the cylinder of the engine.

Fig. 4L is a transverse section through the same.

ln the drawings l have exemplilied the invention as embodied in an internal conihustion engine having but one cylinder. lt will be obvious. however, that the invention is readily applicable to an engine having any desired number ot cylinders.

The working cylinder `oit the engine is shown at* l having a water 4jacket 2 surzment with ports 20-21 respectively.

. exhaust port.

rounding the same with the casing 3 forining said water )acket also forming av casing 4 for a water jacket 5 whichv forms a continuation ot water jacket 2 at one side thereof and surrounds a valve cylinder G longitudinally arranged with relation to cylinder l and disposed at one side thereof.

A block head 8 extends over the top oi.

yboth cylinders l and 6 and is suitably bolted thereto. This head is recessed at its under side as shown at 9 in order to form a passageway between cylinders l and 6, and a `spark plug l() is received through the head. -so as to project within passageway 9.

driven at half engine speed by the train of gearsl', 18 and 19. v

Intake and exhaust ports 20 and 2l cxtend through casing 4 in lateral alinement vso as to communicate with cylinder 6 at the side thereof opposite working cylinder 'L A sleeve valve 22 is arranged for reciprocation within cylinder 6 and is connected by connecting rod 23 `to an eccentric 24 keyed .upon shaftl 16 so that when main crank shaft l5 is rotated the sleeve. valve will be reciprocated at one-halt engine speed.

lntake and exhaust ports 25 and 26 are provided in sleeve 22 in longitudinal aline- The ports 253--25` are ollset laterally in sleeve 22, the intake port being arranged below the A fixed member 27 is positioned within sleeve valve 22 as hy means of an annular 'flange 28 at the top ot said member extending over the upper edge of casing fl and suitably secured thereto as by means ot screws 29. The wall of member 27 is eccentrically arranged so that the bore 30 oie saidmemloer is eccentric with relation to sleeve 22, as clearly shown in Fig. .4. A valve piston 3l is arranged 'for reciprocation within thebore 30 and 'for this purpose is secured to connecting rod 32 which is rin .turn connected to an eccentric 33 arranged` `upon, `shaft 16.V

A laterally elongated port 35 is provided in the member 27 for lateral and longitudinal alinement with ports 20-21. plurality of ribs 36 are arranged in port 35 at the edge thereof adjacent sleeve 22, and a similar plurality of ribs 37 are arranged in port 35 at the edge thereof adjacent the bore 30. Each of these series of ribs are in lateral spaced relation and project inwardly within port 35 only a portion of the distance across said port, so that both the passages 38 provided between ribs 36 and arranged to communicate with ports 25-26 and the passages 39 arranged between ribs 27 and adapted to communicate with the bore 30, are in connection with the laterally extending central portion of the port The operation is as follows:

lVith the parts in the position as shown in Fig. 3, the cycle of operation is at the beginning of the firing stroke. As piston 13 is forced downwardly for causing rotation of the main crank shaft the connecting rods 23 and 32 will be actuated. These connecting rods are so arranged with relation to the shaft 16 that as piston 13 moves downwardly the exhaust. port 26 of sleeve 22 will be brought into communication with port 21 and ports 2S. When piston 13 reaches the end of its expansion stroke the piston valve 31 will uncover ports 39 thereby forming a passageway from the working cylinder through passageway 9, port 35 and port 26 to the exhaust port 21. During subsequent upward exhaust stroke of piston 13 the exhaust gases will be forced outwardly through this passageway. As piston 13 thus moves upwardly downward movement of piston valve 31 is continued and sleeve 22 moves upwardly. When piston 13 has finished its exhaust stroke the piston valve 31. is below port 35 and the exhaust port of sleeve 22 is above said port thereby cuttinJ ofll the registration of the openings provi ing the exhaust passage.

In the suction stroke of piston 13 the piston valve will move upwardly and sleeve 22 will also move upwardly so as'to cause intake port 25 to register with intake port 2O and the ports 26. A passageway from 4intake ports-20 to the working cylinder of the engine is thus completed. Then piston 13 has reached the end of the suction stroke the piston valve will have moved upwardly a sutlicient distance to nearly completely shut off ports 39. A lag for the fuel intake is thus provided. l

As the piston 13 moves upwardly on the compression stroke, piston valve 31 will continue its upward movement to completely shut off ports 39 thereby forming a closed chamber for the compression of the gases. At the same time the sleeve 22 moves downwardly te bring exhaust port 26 to its original position. AThe cycle of operation is thus completed and the parts are ready for the subsequent cycle of movement.

Various changes may be made without departing from the spirit of the inventin as claimed.

llfhat is claimed is:

1. An internal combustion engine including a working cylinder, a valve cylinder at one side thereof having an interior stationary sleeve, a head for said cylinders forming a connecting` passageway, between the working cylinder and the interior of the stationary sleeve, said stationary sleeve having transversely alined inlet and discharge ports, and reciprocating valvular means within said stationary sleeve and within said valve cylinder, each functioning in connection with both of said ports.

2. An internal combustion engine including a working cylinder, a valve cylinder, a stationary sleeve within said valve cylinder having a relatively thick wall, a passageway connecting the interior of said stationary sl eve and said werking cylinder, laterally alined inlet and exhaust ports in said valve cylinder, a port exten ding through the wall of said stationary sleeve in alinement with said inlet and exhaust ports, a sleeve valve surrounding said stationary sleeve within said valve cylinder and having laterally andl longitudinally offset inlet and (exhaust ports, and a piston valve within said stationary sleeve.

3. An internal combustion engine including a working cylinder, a valve cylinder, a passageway connecting the same, said valve cylinder having laterally alined inlet and exhaust ports, a sleeve valve within said valve cylinder having longitudinally and laterally offset inlet and exhaust ports, a stationary sleeve within said sleeve valve having a port in alinement with the inlet and exhaust ports of said valve cylinder, and a piston valve within said stationary member.

4l., An internal combustion engine including a working cylinder, a valve cylinder, a passageway connecting the same, said valve cylinder having laterally alined inlet and exhaust ports, a sleeve valve within said valve cylinder having longitudinally and laterally offset inlet and exhaust valves, a stationary sleeve within said sleeve valve having a port in alinement with the inlet and exhaust ports of said valve cylinder, and a piston valve within said stationary member, the port of said stationary sleeve having dividing4 ribs adjacent said sleeve valve and adjacent said piston valve arranged in spaced relation along said port and forming a passage the length of said port between the same.

In testimony whereof I have signed my name to this specification.

EVERETT R. BURTNETT.

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